The issues at a hearing under this subchapter are whether:
(1) reasonable suspicion or probable cause existed to stop or arrest the person;
(2) probable cause existed to believe that the person was:
(A) operating a motor vehicle in a public place while intoxicated; or
(B) operating a watercraft powered with an engine having a manufacturer's rating of 50 horsepower or above while intoxicated;
(3) the person was placed under arrest by the officer and was requested to submit to the taking of a specimen; and
(4) the person refused to submit to the taking of a specimen on request of the officer.